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Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions

Authorized Users Only
2017
Authors
Gómez-Villalba, Luz Stella
Sierra-Fernández, Aránzazu
Milošević, Olivera
Fort, R.
Rabanal, Maria Eugenia
Article (Published version)
Metadata
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Abstract
Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process ...show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.

Keywords:
Brucite / Periclase / Hydrothermal synthesis / TEM-HRTEM-XRD
Source:
Advanced Powder Technology, 2017, 28, 1, 61-72
Publisher:
  • Elsevier
Projects:
  • Rational design and synthesis of biologically active and coordination compounds and functional materials, relevant for (bio)nanotechnology (RS-172035)
  • Community of Madrid, Spain, Project GEOMATERIALES II (S2013/MIT-2914)
  • Autonomous Region Program of Madrid, Spain, MULTIMAT-CHALLENGE (ref. S2013/MIT-2862)
  • Innovation and Education Ministry, Spain, Project MAT2013-47460-C5-5-P
  • Interministerial Commission for Science and Technology (CICYT), Spain, Project MAT2010-19837-C06-05

DOI: 10.1016/j.apt.2016.08.014

ISSN: 0921-8831

WoS: 000395355100009

Scopus: 2-s2.0-84994705274
[ Google Scholar ]
3
3
URI
http://dais.sanu.ac.rs/123456789/15970
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
TY  - JOUR
AU  - Gómez-Villalba, Luz Stella
AU  - Sierra-Fernández, Aránzazu
AU  - Milošević, Olivera
AU  - Fort, R.
AU  - Rabanal, Maria Eugenia
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/15970
AB  - Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions
SP  - 61
EP  - 72
VL  - 28
IS  - 1
DO  - 10.1016/j.apt.2016.08.014
ER  - 
@article{
author = "Gómez-Villalba, Luz Stella and Sierra-Fernández, Aránzazu and Milošević, Olivera and Fort, R. and Rabanal, Maria Eugenia",
year = "2017",
url = "http://dais.sanu.ac.rs/123456789/15970",
abstract = "Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions",
pages = "61-72",
volume = "28",
number = "1",
doi = "10.1016/j.apt.2016.08.014"
}
Gómez-Villalba LS, Sierra-Fernández A, Milošević O, Fort R, Rabanal ME. Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions. Advanced Powder Technology. 2017;28(1):61-72
Gómez-Villalba, L. S., Sierra-Fernández, A., Milošević, O., Fort, R.,& Rabanal, M. E. (2017). Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions.
Advanced Powder TechnologyElsevier., 28(1), 61-72. 
https://doi.org/10.1016/j.apt.2016.08.014
Gómez-Villalba Luz Stella, Sierra-Fernández Aránzazu, Milošević Olivera, Fort R., Rabanal Maria Eugenia, "Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions" 28, no. 1 (2017):61-72,
https://doi.org/10.1016/j.apt.2016.08.014 .

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